Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities
Net Income	$ 1,115	$ 1,101
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	302	289
Realized investment (gains) losses	(94)	(107)
Deferred income taxes	(8)	14
Net changes in assets and liabilities, net of non-operating effects:
Premiums, accounts and notes receivable	(1,007)	(660)
Reinsurance recoverables	(53)	67
Deferred policy acquisition costs	(112)	(100)
Other assets	41	(98)
Insurance liabilities	542	359
Accounts payable, accrued expenses and other liabilities	216	78
Current income taxes	117	100
Loss on extinguishment of debt	100	0
Other, net	(50)	(41)
Net cash provided by / (used in) operating activities	1,109	1,002
Proceeds from investments sold:
Fixed maturities and equity securities	1,177	510
Investment maturities and repayments:
Fixed maturities and equity securities	691	898
Commercial mortgage loans	341	214
Other sales, maturities and repayments (primarily short-term and other long-term investments)	714	1,404
Investments purchased or originated:
Fixed maturities and equity securities	(1,813)	(2,583)
Commercial mortgage loans	(312)	(183)
Other (primarily short-term and other long-term investments)	(541)	(868)
Property and equipment purchases	(246)	(236)
Acquisitions, net of cash acquired	(107)	0
Other, net	0	12
Net cash provided by/ (used in) investing activities	(96)	(832)
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds	769	790
Withdrawals and benefit payments from contractholder deposit funds	(733)	(758)
Net change in short-term debt	(10)	(96)
Net proceeds on issuance of long-term debt	894	0
Repayment of long-term debt	(938)	0
Repurchase of common stock	(536)	(1,029)
Issuance of common stock	128	80
Other, net	(20)	6
Net cash provided by / (used in) financing activities	(446)	(1,007)
Effect of foreign currency rate changes on cash and cash equivalents	(18)	9
Net increase (decrease) in cash and cash equivalents	549	(828)
Cash and cash equivalents, January 1	1,420	2,795
Cash and cash equivalents, June 30	1,969	1,967
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds	519	514
Interest paid	$ 122	$ 132